Jule keen



(No Model.)

J. KE'EN.

MAGIC LANTERN.

No. 583,624. Patented June 1,1897.

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UNITED STATES PATENT GFEICE.

JULE KEEN, OF NEV YORK, N. Y.

MAGIC LANTERN.

SPECIFICATION forming part of Letters Patent No. 583,624, dated June 1,1897.

Application led February 23,1897. Serial No. 624,560. (No model.)

To all whom it' may concern:

Be it known that I, .IULE KEEN, of New York city, county and State ofNew York, have invented an Improved Magic Lantern, of which thefollowing is a specification.

This invention relates to a magic lantern or stereopticon adapted to besupplied with light by the ordinary illuminating-gas in lieu of by theoxyhydrogen light now usually employed. In thisv way the manipulation ofthe lantern is simplified and the cost accompanying lantern exhibitionsis considerably lessened.

In the accompanying drawings, Figure lis a sectional side elevation online l l, Fig. 2, of a double magic lantern embodying my invention. Fig.2 is a horizontal section on line 2 2, Fig. l; and Fig. 3, a verticaltransverse section on line 3 3, Fig. 2.

The letters a represent the light-holding boxes of the lanterns. Theseboxes are connected in front to the lens-tubes o, adapted to receive theslides c, and at the rear to the tubular extensions d, which, however,may

be dispensed with. The upper lantern may be tilted and focused by meansof the hinged support c and set-screw e' in the well-known manner.Vithin each of the boxes a there is placed a gas-burnerf, which receivesits supply of gas through tube f', two-way cock f2, and connection fafrom the gas-main of a building. Each of the burners fis provided withan incandescent mantle g, placed in alinement with the -lens-tube b andradiating a light which will brilliantly illuminate the imageon thescreen.

The heat of the incandescent mantle and of the products of combustionescaping from the burner would, however, be apt to inj uriously effectthe lantern if the latter were exposed to the action of the same. Inorder, therefore, to adapt the lantern for the reception of this light,I surround the mantle g by an opaque non-conducting chimney 7i,composed, preferably, of a wooden shell having an asbestos lining orjacket 71,. This chimney is provided with a lens h2 opposite thelens-tube b, through which the light is emitted without, however,permitting the escape of heat. The heat of the mantle is iu this wayconfined within the chimney, while the prod* ucts` of combustion risethrough the same and escape out of lateral openings c of box c. In orderto protect the boxes from the effects of these escaping products ofcombustion, the walls of the boxes are lined with an asbestos layer orjacket e', which in this way coperates with the non-conducting chimneyto thoroughly protect the lantern from the effects of the heat.

It will be seen that by my invention I am enabled to obtain a brilliantilluminating effect for magic lanterns by means of an ordinary gas-jet,and that in this way the ma-F nipulation of the lantern is greatlysimplified and the expense connected with displays is reduced.Furthermore, the field of utility of the lantern is considerablyenlarged, as it no longer requires skilled exhibitors and complicatedlight-generators to produce the brilliant illumination which isnecessary to throw perfect images upon the screen.

Of course the invention may be applied to single'lanterns as well as tothe double lantern illustrated in the drawings.

Vhat I claim isl. In a magic lantern the combination of a lens-tube witha box, a gas-burner within the.

box, a surrounding incandescent mantle, an opaquenon-conducting chimneysurrounding the mantle, and a lens within said chimney which is inalinement with the Ienstube, substantially as specified.

2. In a magic lantern the combination of a lens-tube with anasbestos-lined box, a gasburner within the box, a surroundingincandescent mantle, an opaque asbestos-lined chimney surrounding themantle, and a lens within said chimney which is in alinement withthelens-tube, substantially as specified.

JULE KEEN.

W'itnesses:

F. v. BRIEsEN, WILLIAM SCHULZ.

